Thanks...i use the HRS nimbus/couplers you show...they are excellent. Excellent. I have them under my CJ GAT, and under my Zanden DAC (with an HRS damper on top).
I use an M3 base for my TT and a few plates for gear. The base works well but I am guessing not as well as an active or passive pneumatic base. The plates do make a noticable difference, especially on digital sources with a spinning disk that causes vibration. They recommend covering as much surface area as possible. Also the owner of HRS is great to deal with and will work with you to spec your products properly.